Re: yeast infections, I suggest that avoiding oral sex for a week or so might help, as studies show that women who get a lot of oral sex have correspondingly high incidences of yeast infection.
Now there's something useful they could have mentioned in highschool.

And also, have you both been tested recently? Because sometimes chlamydia manifests itself as the worst yeast infection evar, apparently. And in men and women, other symptoms are rare, but it can really affect a woman's fertility, long-term. It's easily cleared up with one dose of antibiotics.